More from the Author

• Journal Article | Frontiers in Integrative Neuroscience | August 18, 2011

  Defining the Contributions of Network Clock Models to Millisecond Timing

  Uma R. Karmarkar

  Citation:

  Karmarkar, Uma R. "Defining the Contributions of Network Clock Models to Millisecond Timing." Frontiers in Integrative Neuroscience 5, no. 41 (August 18, 2011).

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• Article | Journal of Consumer Research | 2010

  Believe Me, I Have No Idea What I Am Talking About: The Effects of Source Certainty on Consumer Involvement and Persuasion

  Uma R. Karmarkar and Zakary L. Tormala

  This research explores the effect of source certainty-that is, the level of certainty expressed by a message source-on persuasion. The authors propose an incongruity hypothesis, suggesting that source certainty effects depend on perceived source expertise. In three experiments, consumers receive persuasive messages from sources of varying expertise and certainty. Across studies, low expertise sources violate expectancies, stimulate involvement, and promote persuasion when they express certainty, whereas high expertise sources violate expectancies, stimulate involvement, and promote persuasion when they express uncertainty. Thus, nonexpert (expert) sources can gain interest and influence by expressing certainty (uncertainty).

  Keywords: Research; Experience and Expertise; Risk and Uncertainty; Consumer Behavior; Performance Expectations; Interests; Power and Influence;

  Citation:

  Karmarkar, Uma R., and Zakary L. Tormala. "Believe Me, I Have No Idea What I Am Talking About: The Effects of Source Certainty on Consumer Involvement and Persuasion." Journal of Consumer Research 36, no. 6 (2010): 1033–1049.

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• Journal Article | Philosophical Transactions of the Royal Society of London, Series A, Physical Sciences and Engineering | 2009

  Evaluating Dedicated and Intrinsic Models of Temporal Encoding by Varying Context

  Rebecca M.C. Spencer, Uma Karmarkar and Richard B. Ivry

  Citation:

  Spencer, Rebecca M.C., Uma Karmarkar, and Richard B. Ivry. "Evaluating Dedicated and Intrinsic Models of Temporal Encoding by Varying Context." Philosophical Transactions of the Royal Society of London, Series A, Physical Sciences and Engineering 364 (2009): 1853–1863.

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